Remove enum conversion warnings

[rbuj]

marco-window-demo.c:1054:32: warning: implicit conversion from ‘enum <anonymous>’ to ‘GtkWrapMode’ [-Wenum-conversion]
 1054 |                                PANGO_WRAP_WORD);
      |                                ^~~~~~~~~~~~~~~
--
ui/draw-workspace.c:109:44: warning: implicit conversion from ‘GtkStateType’ to ‘GtkStateFlags’ [-Wenum-conversion]
  109 |     meta_gtk_style_get_light_color (style, state, &color);
      |                                            ^~~~~
ui/draw-workspace.c:111:34: warning: implicit conversion from ‘GtkStateType’ to ‘GtkStateFlags’ [-Wenum-conversion]
  111 |     get_background_color (style, state, &color);
      |                                  ^~~~~
ui/draw-workspace.c:160:39: warning: implicit conversion from ‘GtkStateType’ to ‘GtkStateFlags’ [-Wenum-conversion]
  160 |   gtk_style_context_get_color (style, state, &color);
      |                                       ^~~~~
--
ui/draw-workspace.c:236:20: warning: implicit conversion from ‘GtkStateFlags’ to ‘GtkStateType’ [-Wenum-conversion]
  236 |                    state);
      |                    ^~~~~
--
ui/theme-parser.c:2375:17: warning: implicit conversion from ‘GtkStateFlags’ to ‘GtkStateType’ [-Wenum-conversion]
 2375 |       state_val = meta_gtk_state_from_string (state);
      |                 ^
ui/theme-parser.c:2414:32: warning: implicit conversion from ‘GtkStateType’ to ‘GtkStateFlags’ [-Wenum-conversion]
 2414 |       op->data.gtk_arrow.state = state_val;
      |                                ^
ui/theme-parser.c:2458:17: warning: implicit conversion from ‘GtkStateFlags’ to ‘GtkStateType’ [-Wenum-conversion]
 2458 |       state_val = meta_gtk_state_from_string (state);
      |                 ^
ui/theme-parser.c:2485:30: warning: implicit conversion from ‘GtkStateType’ to ‘GtkStateFlags’ [-Wenum-conversion]
 2485 |       op->data.gtk_box.state = state_val;
      |                              ^
ui/theme-parser.c:2521:17: warning: implicit conversion from ‘GtkStateFlags’ to ‘GtkStateType’ [-Wenum-conversion]
 2521 |       state_val = meta_gtk_state_from_string (state);
      |                 ^
ui/theme-parser.c:2537:32: warning: implicit conversion from ‘GtkStateType’ to ‘GtkStateFlags’ [-Wenum-conversion]
 2537 |       op->data.gtk_vline.state = state_val;
      |                                ^
--
ui/theme-viewer.c:210:32: warning: implicit conversion from ‘enum <anonymous>’ to ‘GtkWrapMode’ [-Wenum-conversion]
  210 |                                PANGO_WRAP_WORD);
      |                                ^~~~~~~~~~~~~~~